ok opinions PLEASE...trying not to freak

ok opinions PLEASE...trying not to freak

Ok, so I've been TTC #2 since October when I had Mirena removed. Periods were normal pretty quickly. According to all these lovely ovulation apps, I should have o'ed around the 14-15. I had slight cramping around then, which I took as a sure sign of ovulation. Hubby and I had a BD party last week. Now I try not to symptom spot, but I noticed more light cramping and pulling sensations several days ago, which I usually don't have. When my boons started hurting, (first thing I noticed with DD) I thought maybe it's a possibility. Then started nausea and fatigue, which I did NOT have last pregnancy. Then Wednesday, I had light spotting. I have never in my LIFE bled between cycles. I didn't have IB with DD though, but i thought for sure that was what it was. Here's the issue... today I woke up with more spotting, bright red blood and still very mild cramping plus all other symptoms. Can this still be IB for 3 days now if it looks like more today?? AF isn't due until next Thursday. I'm so confused as to what else this could be. I don't want to waste tests and get upset with a BFN for testing too early, but I'm kinda freaking out. Can anybody please respond and share your thoughts?